620998667 has 2 divisors, whose sum is σ = 620998668. Its totient is φ = 620998666.

The previous prime is 620998649. The next prime is 620998673. The reversal of 620998667 is 766899026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620998667 - 2¹² = 620994571 is a prime.

It is not a weakly prime, because it can be changed into another prime (620998607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310499333 + 310499334.

It is an arithmetic number, because the mean of its divisors is an integer number (310499334).

Almost surely, 2^620998667 is an apocalyptic number.

620998667 is a deficient number, since it is larger than the sum of its proper divisors (1).

620998667 is an equidigital number, since it uses as much as digits as its factorization.

620998667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 620998667 is about 24919.8448430162. The cubic root of 620998667 is about 853.1594835082.

The spelling of 620998667 in words is "six hundred twenty million, nine hundred ninety-eight thousand, six hundred sixty-seven".